Fuel system of diesel engines Peugeot 305

Fuel and exhaust system specifications
System type: With a rear-mounted fuel tank, high-pressure fuel pump with a built-in booster pump and pre-chamber injection. The firing order of the cylinders is 1-3-4-2 (cylinder N 1 from the flywheel side) Fuel Type -...

General description of the fuel and exhaust system
The fuel system consists of a rear-mounted fuel tank, fuel filter, high-pressure fuel pump, injectors and associated parts. The exhaust system is similar to that used on petrol models. Fuel is drawn from the tank by a...

Fuel filter housing — modifications
1. Since the end of 1989. (205 models) or since the beginning of 1990. (309 models) changes have been made to the design of the fuel filter. The filter with water heating of the base is no longer installed. The fuel is...

Air cleaner and air filter — removal and installation
1. On 205 and 309 models, disconnect the air intake duct from the tube on the front panel (see photo). 2. On 305 models, disconnect the air intake and outlet ducts from the air cleaner. 3. Loosen the nut or screw and...

Fuel injection pump — removal and installation
1. Disconnect the negative cable from the battery. 2. Cover the generator with a plastic bag to prevent fuel from spilling on it. 3. Remove the air cleaner with air ducts ( see section 3 ). 4. Where necessary,...

Fuel injection pump (Lucas CAV/Roto-Diesel) — checking and adjusting injection timing
Caution: The maximum engine speed and intermediate pressure adjustment screws, as well as the plugs closing the inspection holes for adjusting the injection timing, are closed and sealed by the manufacturer during...

Fuel injection pump (Bosch) — checking and adjusting injection timing
Please note: Some of the pump adjustment screws and inspection plugs may be sealed during factory assembly. If the car is still under warranty, these seals cannot be removed. Do not attempt to adjust the pump timing...

Fast idle speed cable — removal, installation and adjustment
1. If necessary, remove the air cleaner with air ducts. 2. Drain the coolant ( see chapter 2 ). 3. Loosen the clamp screw or nut and remove the end clamp from the cable (see photos). 4. Unscrew the lock nut and remove...

Throttle Pedal Cable — removal, installation, and adjustment
1. Move the feed lever on the high-pressure fuel pump to the open position and disconnect the cable by passing it through a special slot (see photos). 2. Disconnect the adjusting ring and cable sheath from the bracket...

Idle speed — checking and adjustment
1. A conventional tachometer that operates on the basis of ignition system pulses cannot be used in the case of diesel engines. In principle, a special diagnostic socket is provided that allows connection of Peugeot...

Lucas CAV/Roto-Diesel Fuel Pump — minimum speed control
Note: To adjust the minimum RPM you will need a tachometer - see alternative methods. v section 9 . 1. Start the engine, bring it to normal operating temperature and then turn it off. 2. Insert a 3.0 mm thick washer or...

Bosch injection pumps manufactured since January 1984 — minimum speed control
Note: To adjust the minimum RPM you will need a tachometer - see alternative methods. in section 9. 1. Start the engine, bring it to normal operating temperature, note the idle speed and turn off the engine. 2. Insert a...

Maximum engine speed — checking and adjustment
Please note: On the Lucas CAV/Roto-Diesel injection pump, the maximum speed adjustment screw is sealed and taped during factory assembly. If your car is still under warranty, this seal must not be removed. Adjusting...

Fuel injectors — removal, inspection and installation
Caution: Handling injectors requires extreme caution. Be careful not to let fuel from the injectors come into contact with your skin, as this can cause serious irritation. We strongly recommend that you entrust all work...

Pre-heater — description and testing
1. Each of the swirl chambers has its own pre-heater plug (often called a glow plug). These spark plugs are turned on before and during starting a cold engine. To start a hot engine, a pre-heater is not required. 2. If...

Pre-heater relay and spark plugs — removal and installation
Glow plugs 1. Check that the ignition is off. 2. Remove the air cleaner with air ducts ( see section 3 ). 3. Remove the plastic clips from the glow plug terminals (see photo.). 4. Unscrew the nuts from the glow plug...

Shut-off solenoid — description, removal and installation
1. The shut-off solenoid is located at the end of the fuel injection pump next to the injector tubes (see photos). Its function is to cut off the fuel supply when the ignition is turned off. If the solenoid's supply...

Injection system — bleeding
1. After disconnecting any part of the system or after the engine has shut down due to lack of fuel, the system must be bled before starting the engine (pump fuel into it and remove air). 2. Loosen the bleed screw on...

Injection system (latest models) — bleeding
1. On the latest models, the manual priming pump has a rubber bulb and is located on the right side of the engine compartment (see photo 4.59). 2. When the bulb is squeezed, fuel is forced into the fuel filter housing...

Fuel level sensor (model 405) — checking
1. If you suspect that the fuel level sensor is giving incorrect readings, you should first check whether it is installed correctly, since if the sensor is incorrectly positioned, the movement of its lever may be...

XUD9 engine misfires (405 models with CAV/Roto-Diesel injection pump) — causes
1. If the engine misfires under light load and at constant speeds of around 2500 rpm, the following checks can be performed (please note that this only applies to models with CAV/Roto-Diesel injection pumps, and not...

Collectors — removal and installation
Intake manifold 1. Disconnect the negative cable from the battery. 2. Remove the air cleaner ( see section 3 ) and disconnect the air duct from the intake manifold (see photo). 3. Remove the brake booster vacuum pump...

Turbocharger — description
1. A turbocharger is installed on the XUD7T and XUD9T engines. It improves engine efficiency by increasing the pressure in the intake manifold above atmospheric pressure. Instead of being sucked into the cylinders, air...

Turbocharger — precautions
5. The turbocharger operates at very high speeds and high temperatures. To avoid premature failure of the turbocharger and ensure its safe operation, certain precautions must be taken. 6. Do not operate the turbocharger...

Turbocharger — removal, inspection and installation
Removal 10. Disconnect the negative cable from the battery. 11. Raise and support the car. Remove the lower engine shield. 12. Remove the exhaust system. Remove the 2 pins securing the exhaust downpipe to the...

Exhaust system — inspection, removal and installation
1. Periodically inspect the exhaust system for leaks, corrosion and damage, as well as for the reliability of its fastening. Small holes are most easily spotted by briefly plugging the exhaust pipe with a rag while the...

Diagnostics of injection system faults
The engine turns over normally, but does not start Empty fuel tank The engine starting procedure is not performed correctly The fuel filter is clogged The fuel contains paraffin and resins (manifests itself in cold...

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